After all, our ancestors were non-speaking apes and our language presumably evolved from such acoustic signals.
毕竟，我们的祖先是非言语类猿，而我们的语言就可能是从这些声波信号演变过来的。
2
Generally speaking, ceramics are what you get when you apply heat to certain inorganic, non-metallic solids and then allow them to cool.
一般来说，陶瓷就是你加热某些无机的、非金属的固体然后让它们冷却得到的东西。
3
In the first semester, we run an eight-week conversation class for students of non-English-speaking backgrounds, who wish to improve their fluency, grammar and pronunciation in English.